Valve



G. HANSEN July 7, 1953 VALVE Filed Dec. 22. 1947 Patented July 7, 1953George Hansen, Chicago, Ill., assigner to Crane Co., Chicago, Ill., acorporation of Illinois Application-December 22, 1947, Serial No.793,139

This invention relates to valves and more-par.- ticularly to a valveusing: a novel -form lofseating means between the disc or closure^memberand the valve seat.

Heretofore it has been difcult to obtaina valve in which the valveclosure memfbenwould remain tight under conditions of varied-services.By the present invention different typesoieasil-y renewable valveseatingmaterials-may berconveniently and cheaply-applied.. Tenir-awarethat packless or diaphragm types of valves have heren tofore beenemployed, butto my knowledgenone has possessed theadvantages ofv thisinvention.

It is one ofthe moreimportantobiects `of this invention to provideIforfa Yvalve. construction in which easy seat face renewability maybeeected and also one in whichthe valve may be readily sealed at its upperendportionbetween thestem bearing and theY valve body or. bonnetconnection without employinga stufng box.

Another important object is .to provide for a construction in which theYuse of. composition or renewable discs may be .eliminated and-the moreexpensive and relatively complicatedco'nnec-tions between the disc andthe disc holder may alsobe avoided,

Another object .is to provide -for avalvei construction in whichresistance to corrosion is easily 5 onine (C1. 251.459)l handledbyvirtue of' the fact thatfthevdiscritself and a substantial portionofithe actuating stem construction may be effectively "covered by'anelongated extension of th renewable seat -facing oi the closure member.thereby to provide vfor a continuous connection between the protected.por-Y tion of the stem bearing and the disc, enabling both members toresist corrosion againstthe line fluids being conveyed.

Another benet arising from the use Vof this inl is required.

Other objects and advantages will become more readily apparent uponproceeding with'the following specification in light ofthe accompanyingdrawings in which: Y *A Fig. l'is et-fragmentary sectional assembly viewof al preferredembodimentfof'my invention'.

lsternl 6 either upwardly or downwardly will provide fora nevi/'seatingsurface by merelyI loosen- Fig. 2 is'a modiedview of the formfshown inFig. l, in a fragmentary sectional assembly view. Figs. 3, 4 and 5 arefurther modied forms.

Similar reference characters refer to similar vparts throughout theseveral views.

Referring now to Fig. l, the fragmentary body or Ycasing I is shownhaving-the usual inlet2 andthe outlet 3. Adjacent to the inlet2 aseat isprovided consisting of the annular projection 4 yagainst which the usualclosure member generally referred to as 5 'abuts in seating relation.The closure .member 5 consists.substantially` of a `stern portion 6having a lower head lprefera-bly recessed as at 8 for reasonshereinafter described.

Thestem may be reciprocally-moved either by means of the usual threads(not shown) or else bysuitable lever Vmeans (also not'shown) vin orderto eiectually move the closure member toopen and closed positions. Asindicated, the stemt is Venclosed in a tightly tted sleeve preferably:of rubber or the like, generally referred vto as .9 and having anVinwardly extending `lower vportion around the head. ll of the stem so asyto allow` for entry of the extension H Within the recess 8. It will beapparent thatbecause of being relatively tightly stretched over :thestem, the lowermost end of. the sleeve 9 when containedwithin therecess8 is snugly fitting, as indicated. Atthe upper end por-tionfofY the stemwhere the sleeve ,bears against lthebody surface .bearnggat I`2., a.truste-'conical space I3 is formed-within which the upper end limitsVof 4the .sleeve 9` are ycontained jas shown, the bushing M, threaded asat l 5 being used ,to h old the preferably folded-over sleeve as .atal 6in compressed .positionas indicated. It may be desirable, althoughnotlnecessary, Vthat a truste-conical .spacermember I'I. beV used. Thusitwill be apparent that ,the stuffing :box normally employed around Vtheupper stem portion is eliminated and is conveniently replacedby the formof Yconnection described.

of a rubber-like material, .will .stretch suitably to permitthedescribedi closure movement,V thus Yprotectingthe stem 6' against"the detrimental action of corrosive iiuids.` YFurtherit will vbeapparent that asV wear occurs vat the turned-in or flanged portion ofthe sleeve where it conta-cts theiseat A axial movement ofthes'leeve'along-the tllebushing and permittingthe rubber 'sleeve'to be:Withdrawn tog th'ejeXtenthecessary forfprovidingi anewpontactlsurfac'eat the seatf.

It will be equally clear that because of employing a new or unusedportion of the folded-over end I6, increased tightness may fbe effectedat this portion of the sleeve if wear has previously occurred. Thus inboth ends where contact is made with the body, it will be materiallyimproved by simple movement of the sleeve longitudinally along the stemrst at the seat 4 and second at the stuffing box .portions I3respectively. Thus it will be apparent that a simple substantiallytubularform of resilient material has been pro v vided which whenstretched over the core in the form of a disc holder or stem serves adual purpose, the resilient member 9 serving as the disc contact surfacewhen closing the valve and allowing the resilient material to bel drawnover the stem head l `with ends folded back into the recess S asindicated. Thus the construction. does not necessarily require a screwmember as shown and hereinafter described in connection with Fig. k4 tohold the rubber in place. The outer periphery 4 Y movement of the stem.In the instant construction it will be apparentV that the rotatablymounted stem by reason of its rotation upon threads 21 will lift thedisc 25 or lower the same (depending upon the direction of rotation) and1 surface I3 when the sleeve is moved axially to its of the recess wallacts as a shoulder when fluid line pressure is applied to the contactsurface at 4 of the valve. Since the tubularmember 9 is axially movable'upon the stem when temporarily loosened at I4, it can fbe changed sothat as the material wears, the old seating surface can be easily drawndown (or up) and a new fresh seating ycontact can be Supplied easily andcontinuously many times. Since the tubular resilient material isstretched over the metal more initially a tight fluid seal is effectedwhich line pressure will help to keep tight. No one apparentlypreviculy'has appreciated the fact that by having a tubular vresilientmember predeterminedly movable axially, new seat contacts` can easily bemade land iiuidtightnessalso effected at the upper end portion normallysealed by a stuffing box and Referring now to Fig. 2, a modifiedconstrucltion is shown in which a swivel type of stem is employed withthe lclosure member. A fragmentary body I8 is shown having the seatopening I 9, the usual valve seat 4, and a bonnet supporting portion 2|for the stem and closure memment for'supporting the flexible tubularmember or sleeve generally referred to at 22, the latter encloses asubstantial portion of the length of the Vsteml 23 and'also its headportion 24 which latter portion is swivelably connected to the discholder 25 by means of the threaded bushing 26. If'hus relativerotational movement is provided ,between the stem and the disc holder 25in order to permit the stem having the integral threads 2l to berotatably movable and thereby eect reciprocal movement of the disc andsleeveV during the course of opening and closing the valve, that ismoving to and from the valve seat 4 without necessarily rotating themember 25. Preferably in order to guide the stem relatively closely inrelation to the head 25, the stem is made with theshouldered portions 24and 28.

Similar to the manner described in connection withV Fig. .1, the upperannular folded-over portion of the sleeve 22 is retained on thefrustoconical surfacev I3 as indicated by means of the ,bushing I4.` fAconventional cover 29 is threadedly mounted` as shown. At the upper endof the stem, a hand-Wheel (not shown) is usually provided in order toeffect the desired rotational previous position relative to the stem andholder. It should, of course, be clear that the detailed manner in whichthe connection is made at the upper end portionfof the sleeve 22 andalso the manner in which it is Ystretched over the disc holder 25, mayvary substantially from the details shown. For example the shape of theclosure member may be changed in order to suit the particularinstallation or the type of valve employed for such installation. In thelatter connection reference is made to the modified forms of Figs. 3, '4and 5 which show methods in which the flexible tubular or sleeve membermay be mounted over certain types of disc holders or end portions ofstems as the casemay be in order to suit various types of valvesemployed and in Whichthe sleeve is mounted solely upon such members asthe disc holders or stems without attachment to the casingas hereinabovedescribed.

Referring now to Fig. 3 it is deemed desirable under certainconditions'to notch the end portion of the stem annularly as at 32 abovethe head 3l as indicated. As wear occursfon the seat face 33 the sleeve34 is stretched and moved axially either upwardly or downwardly over thehead 3l. The end portion 35 will then engage one of the notches 32depending upon the amount of wear which has taken place at the seatcontact 33. The lower end portion Il of the sleeve as described inconnection with Figs. V1 and 2 preferably extends within therecess V8.The particular purpose of the annularly extending grooves 32 is toinhibit relative axial movement of the sleeve 34 in connection wtih thestem head 3|, but thedetailed methodlof attachment is not speciallyimportant and may vary considerablyl from that illustrated.

Directing attention to Fig. 4 a similar construction is shown which maybe made unnotched as illustrated. However at the lower end portion `ofthe` head 3l normally providing the recess 8 (see Fig. 3), a morepositive means is used to attach land hold'the lower end portion of asleeve 34. Specifically a counter-bore head machine screw l36 is used`which clamps `the kinner `end portions of the sleeve 34 against thecounter-bored surface 31 as shown. Thus in this construction if Y Vstemthread 21 is employed for the purpose of providing the desiredreciprocal or axial movement of the closure member or stem relative tothe seat 4, the latter not being shown, but being similar to thatillustrated in Fig. 2. It has been found that with such-method ofattachment as hereinaboveprovided itis not; necessary to engage orotherwise restrain the upper end portion of the sleeve against relativeaxial movement. When the seat portion 33 must be renewed due to wear, itcan be done easily by simply unscrewing the counter-bore screw 36 sothat the end portion immediately adjacent the screw head may be moved toprovide the desired new seating surface 33.

In Fig. 5 a still further modified form is shown in which the endportion of the stem is provided with an enlargement or head38 over whichis spun or otherwise attached the tubular extension 39. Obviously thelatter member may be suitably brazed, threaded or otherwise attachedV tothe head portion 38. At its opposite end the extension 39 is foldedinwardly to provide the inner annular ange 40 over which is suitablystretched the flexible sleeve 4 I It will be apparent that by thisarrangement a large chamber 42 is provided,

whereby as wear occurs at the seat portion 33 the l sleeve 4l is moveddownwardly or upwardly (as the case may require) relative to theextention 39. It will be clear that a considerable amount of axialmovement downwardly relative to the head extention 39 may take place bysimply folding the flexible sleeeve as at 43 within the chamber 42, theseat contact surface 33 changing as wear occurs in the same manner asdescribed in connection with the previous ngers. Obviously thisconstruction enables changes to be made relatively easy without thenecessity of doing any trimming of the end of the sleeve as seat wearoccurs. In certain small sizes and types of valves the latter featuremay be desirable as for example in the relatively cheaper types ofvalves such as radiator valves, Water valves, hose valves and the like.Y

While this invention has been shown in several forms it should beobvious to those skilled in the art that it is not so limited but issusceptible of various changes and modifications without departing fromthe spirit thereof or the scope of the appended claims.

I claim: Y

1. A progressively renewable seating face of exible material snuglyenclosing a valve closure member with a transverse lend surface and ahollow central portion, the flexible material being in substantiallytubular form, said seating face extending in a flat radial planerelative to the control axis of the said closure member and being formedas an annular Vdeflection of an end portion of the flexible material,the latter material being predeterminately movable axially whilemaintaining substantial surface contact with the said closure member toselectively provide a new seating face over the transverse end surfaceof said closure member upon occurrence of such axial movement of theexible material relative to the said closure member, and means engagingAthe hollow central portion of the valve closure member and gripping theannular deflection of said flexible tube to predeterminately retain thelatter member in lixed axial position.

2. A progressively renewable seating face for a portion of a valveclosure member or the like having a hollow lower end portion, thecombination including the mounting on said closure memberY of a tubularmember of flexible material axially movable predeterminately relative tothe closure member and having on its pernphery adjacent the said endportion of the closure member a plurality of progressively usabletransverse annular seating faces, an end rim portion of said tubularmember beyond the lOWermQSt of said seating faces being inwardly turnedannularly within the hollow lower portiony of the closure member to formthe extension of a tubular angular deilection of the said flexiblematerial inwardly. Y

3. A tubular axial member of distortable material serving as the seatingface of a valve closure, the combination including a valve casing, saidseating face being progressively renewable upon the occurrence ofpredetermined steps effecting axial movement of said exible materialrelative to the closure member, one end of said exible material beingenlarged and being retained in fluidtight relation to the valve casingto restrain said liexible material against axial movement, the saidclosure member including a head portion with an end transverse surfaceportion to support an end rim of the said distortable tubular member,said closure member having central reduced annular means in a pluralityof planes to facilitate holding said distortable member at successiveend axial positions.

4. A tubular angularly deflectable member of flexible material servingas the seating face for a valve closure member, said seating face beingprogressively renewable upon predetermined axial movement of saidflexible material relative to the closure member, annular recess meansprovided by an annular transverse surface of the closure member forengagement by an annular end portion of the said flexible materialwhereby an inner annular portion of said flexible material axiallyparallel to the tubular portion of said flexible material may beretained to hold said liexible material against combined axial andtransverse displacement in a plurality of planes relative to saidclosure member.

5. The combination of a tubular member for providing contact faces influidtight joints and a core with a depressed end portion within thetubular member, said tubular member being of flexible materialpredeterminately movable relative to said core, at least a lower headend portion of said core being substantially enclosed by said flexiblematerial except for a central inturned annular end portion of thetubular member received within the core depressed end portion, saidtubular member upon successive steps of axial movement relative to thesaid core thereby providing a new contact face for a fluidtight face insubstantially a plane transverse to the direction of axial movement uponthe occurrence of such movement of said tubular member upon' the saidcore, said tubular member being movable in opposite axial directionsrelative to the core to effect the said renewal of the contact-face.

GEORGE HANSEN.

References Cited in the flle of this patent UNITED STATES PATENTS NumberName Date 21,858 Swan Oct. 19, 1858 48,721 Regester July 11, 1865347,156 Bowen Aug. 10, 1886 1,602,047 Shu1theis Oct. 5, 1926 1,971,186Kernas Aug. 21, 1934 2,226,972 Greve Dec. 31, 1940 2,444,471 SamiranJuly 6, 1948 FOREIGN PATENTS Number Country Date 14,245 Great Britain of1852 40,079 Germany of 1887 603,632 France of 1926

